CN102251301B - Production process of ultrafine-denier high-strength viscose fibers - Google Patents
Production process of ultrafine-denier high-strength viscose fibers Download PDFInfo
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Abstract
The invention discloses a production process of ultrafine-denier high-strength viscose fibers. The production process comprises the steps: immersing, squeezing and crushing, wherein the crushing degree of alkali cellulose is not more than 1.0%; filtering, wherein spinning glue has the particle count of smaller than 30pieces/gram and has the particle diameter of 20-40mu m; spinning and forming, wherein a forming process comprises the steps of primary bath and secondary bath, and a spinneret is an annular combined type tantalum spinneret and has the pore diameter of 0.05mm; drafting, wherein the total degree of draft is 120-140% and the degree of primary draft is 38-42%; and refining, wherein in a refining process, the temperature of a desulfuration bath is 80-85DEG C, the NaOH concentration of the desulfuration bath is 1-3g/L, and the PH value of acetic acid in a collection tank is 4-6. According to the invention, the effects on reducing denier and improving strength for the ultrafine-denier high-strength viscose fibers are realized; and the ultrafine-denier high-strength viscose fibers have the denier of 1.11dtex and the strength of more than 2.9DN/DTEX.
Description
Technical field
The present invention relates to a kind of production process of ultrafine-denier high-strength viscose fibers.
Technical background
The level of living along with people improves constantly, and also more and more higher to the requirement of textiles, the high-grade textile product of high-tech, green, ecology, environmental protection is won consumers in general's favor day by day.
The renewal of constantly upgrading of domestic spinning process and equipment changes to the advanced high-speed spinning equipment such as compact spinning, match network spin, vortex spinning from ring spinning machine in the past, the physical indexs such as the intensity of viscose, fiber number have also been proposed requirements at the higher level; Developing new textile material multi-functional, high added value, is constantly to increase the product market share at home and abroad, improves the needs of product competition level, is also the needs that improve constantly company's benefit.Development ultrafine-denier high-strength viscose has a extensive future.
Common viscose staple fibre develops so far approximately 100 years history, is mainly used in the traditional textile spinning, and concrete quality index is mainly pressed GB/T14463-2008, and general fibre goods yarn strength is low, and yam count is common, can only be used for mill run production.
In the recent period, Tangshan Sanyou Group Chemical Fiber Co., Ltd discloses high white powerful fine denier viscose staple fibre production technology, its publication CN100359050C, it fiber number between 0.90～1.40dtex, do strong only more than or equal to 2.5CN/dtex; It is done can not satisfy the high-end customer demand by force.
Shanghai Shuanglu Chemical Fiber Co., Ltd. discloses the ultralow dawn fiber production technology of viscose, and publication CN1418990A due to the characteristic of only emphasizing fiber number 0.56～0.22 dtex, does not relate to and does strong index.
Summary of the invention
Its purpose of the present invention just is to provide a kind of production process of ultrafine-denier high-strength viscose fibers, has solved the reduction fiber number of ultrafine-denier high-strength viscose and has put forward high-intensity problem.Fiber number is that 1.11 dtexs and intensity are greater than 2.9CN/DTEX.
The technical scheme that realizes above-mentioned purpose and take comprises:
1) dipping, squeezing, alkali cellulose are pulverized, described alkali cellulose degree of grinding≤1.0%;
2) spin glue and filter, the described micelle subnumber that spins, particle diameter are 20--40 μ m, less than 30/gram spinning glue;
3) spinning, described first fibre is 8.9 ± 0.1%, contains alkali 5.4 ± 0.1%, 50 ± 3 seconds falling ball methods of viscosity, degree of ripeness 14 ± 2ml10%NH4Cl, 1-2 kg/tonne of silk of auxiliary agent visco-388,0.2-0.5 kg/tonne of silk of auxiliary agent visco-32;
4) moulding, described moulding process comprises a bath, sulfuric acid concentration 106--110g/l, zinc sulfate 12.0---14.0g/l, proportion 1.310-1.325, sour temperature 46---50 ℃; Two bathe, sulfuric acid concentration 40--50g/l, and temperature 70---85 ℃, in described moulding process, spinning head is circular combined tantalum spinneret, spinning head aperture 0.05mm;
5) drawing-off, described drawing-off total draft rate is 120-140%, one drawing-off 38---42%;
6) concise, in described refining process, the desulfurization bath temperature is 80---85 ℃, and desulfurization bath concentration NaOH is 1-3 g/l, and feeder acetic acid pH value is PH 4---6.
Compared with prior art, the invention has the advantages that the ultrafine-denier high-strength viscose of chemical viscose fiber, to design and selection, the configuration of adhering process and equipment, produce the high-quality glue that spins, when spinning moulding, the design condition of molding, by drawing-off, change fiber molecule and arrange, reach fortifying fibre intensity, simultaneously, hang down the diameter spinneret orifice and adjust the total draft rate by speciality, reaching the adjustment fiber number, making fiber number reach 1.11dtex.
The specific embodiment
Comprise:
1) dipping, squeezing, pulverizing, described alkali cellulose degree of grinding≤1.0%;
2) filter, the described micelle subnumber that spins, particle diameter are 20--40 μ m, less than 30/gram spinning glue;
3) spinning, described first fibre is 8.9 ± 0.1%, contains alkali 5.4 ± 0.1%, 50 ± 3 seconds falling ball methods of viscosity, degree of ripeness 14 ± 2ml10%NH4Cl, 1-2 kg/tonne of silk of auxiliary agent visco-388,0.2-0.5 kg/tonne of silk of auxiliary agent visco-32;
4) moulding, described moulding process comprises a bath, sulfuric acid concentration 106--110g/l, zinc sulfate 12.0---14.0g/l, proportion 1.310-1.325, sour temperature 46---50 ℃; Two bathe, sulfuric acid concentration 40--50g/l, and temperature 70---85 ℃, in described moulding process, spinning head is circular combined tantalum spinneret, spinning head aperture 0.05mm;
5) drawing-off, described drawing-off total draft rate is 120-140%, one drawing-off 38---42%;
6) concise, in described refining process, the desulfurization bath temperature is 80---85 ℃, and desulfurization bath concentration NaOH is 1-3 g/l, and feeder acetic acid pH value is PH 4---6.
Described filtration comprises secondary filter, and the secondary filter filter screen adopts 15--25 μ m stainless steel metal fibre sintering felt.
In described moulding process, one bathes tow length of immersion 700mm and two baths is placed in godet roller top in spinning machine, and one bathes and two bathes and all filter, and described two bathe filtrations, and to choose diatomite be the drainage medium.
Described spinning head is tantalum spinneret, and carries out surface treatment through the reaction of tantalum melten salt electriochemistry.
The ultrafine-denier high-strength viscose is to belong to one of fibre in differentiation kind, is a kind of textile raw material of high-quality, high-tech.
It is take native cellulose as raw material, make the soluble cellulose xanthate acid through operations such as alkalization, aging, yellows, be dissolved in again sig water and make viscose glue, in order to improve physical property as improving intensity, reduce fiber number in these processes, added auxiliary agent in viscose glue, when viscose still is in large molecule noncrystal, during by low diameter spray silk circular hole, select suitable degree of draft and molding technological condition, reach the fiber number of adjustment fiber and the purpose of intensity.
Embodiment is fiber number 1.11 dtexs, and intensity is greater than 2.9CN/DTEX.
The product main production comprises, pulp, is pulverized at dipping, squeezing, and is experienced, yellow, and rear dissolving, maturation, filtration, spinning, drawing-off (one bathe, two bathe) are cut off, and be concise, oven dry, packing.
Technological parameter
(1) disintegrating process
Alkali cellulose degree of grinding≤1.0%;
(2) filtering technique
Spin micelle subnumber (particle diameter 20--40 μ m), less than 30/gram spinning glue;
(3), spinning glue forms:
First fibre 8.9 ± 0.1%
Contain alkali 5.4 ± 0.1%
50 ± 3 seconds falling ball methods of viscosity
Degree of ripeness 14 ± 2ml (10%NH4CL)
1-2 kg/tonne of silk of auxiliary agent visco-388
0.2-0.5 kg/tonne of silk of auxiliary agent visco-32
(4), moulding process
(1) one bathes composition
Sulfuric acid concentration 106--110g/l
Zinc sulfate 12.0---14.0g/l
Proportion 1.310-1.325
Warm 46---50 ℃ of acid
(2) two bathe composition
Sulfuric acid concentration 40--50g/l
Temperature 70---85 ℃
(3) spinning head aperture 0.05mm
(5), drawing-off distributes
Total draft rate 120-140%
One drawing-off 38---42%
(6), refining process
80---85 ℃ of desulfurization bath temperature
Desulfurization bath concentration (NaOH) 1-3 g/l
Acetic acid PH (feeder) PH 4---6
To the improvement of viscose glue Preparation equipment, greatly improved the viscose glue quality, created condition for producing the ultrafine-denier high-strength viscose, concrete manifestation is as follows:
(1) viscose filtration
Because the product fiber number of producing is less, the spinneret orifice footpath also should relatively little (injection diameter be 0.05 millimeter), injection diameter is less, the easier plug-hole of impurity, therefore, the impurity content in spinning viscose is the smaller the better. and for this reason, used the KK filter to carry out secondary filter, 15--25 μ m stainless steel metal fibre sintering felt is adopted in choosing to KK filter filter screen, has greatly reduced the impurity in the viscose glue.
(2) the viscose glue dissolving is ground
Adopt three grades of fine gtindings, the fine grinding machine internal structure is improved, change by multi-layer rotor, stator and form, the setting from coarse to fine of the fluted disc of every layer of rotor stator makes the successively refinement of viscose glue particle, homogeneous.Greatly improve the efficient that viscose glue grinds, fully guaranteed the quality of dissolving glue.
(3) alkali is fine pulverizes
Adopt serriform gear rack three-roller type pulverizer, by between pulverization roller and and scraper between the adjustment in gap, improved the fine degree of grinding of alkali, increased the specific area of alkali fibre, be conducive to the carrying out of subsequent chemical reaction;
(4) yellow consersion unit
Adopt horizontal single spiral belt, band temperature adjustment chuck xanthating machine, agitator single-axis bidirectional spiral belt stirs without the dead angle, and the yellow reaction is even, and the yellow reaction effect improves greatly.
To spinning the improvement of experienced equipment, be conducive to the raising of the physical properties of finished product, concrete manifestation is as follows:
(1) in spinning in forming process, adopt one to bathe (deep bathing type) and two and bathe the moulding that combines, one bathes tow length of immersion 700mm and two baths is placed in above godet roller in spinning machine; Be conducive to the large molecular ordered arrangement of fiber, be conducive to the raising of fibre strength;
(2) two bathe filtration.
Select the Fen Beike filter, choose diatomite FUNDABAC filter drainage medium, guarantee that two bathe cleaning, be conducive to the improvement of condition of molding;
(3) to selection and the improvement of spinning head.
Determining of spinning head aperture: the size reasonable in aperture is related to variation, draft process and the moulding process of the composition of spinning glue, until affect the product physical property, through theory analysis and calculating, determine that injection diameter is 0.05 millimeter. and select circular combined spinning head, the chemical reaction that is beneficial in moulding evenly carries out.
But use the spinning head of aperture less, easy plug-hole when spinning moulding can cause the product fault high, even can't spinning.spinning head material, processing and manufacturing technology are very important, for this reason, we improve pore size precision and the micropore fineness of spinning head, the micropore Streamline Design is improved, improved the spinnerette material, its scratch resistance and non-deformability effectively improve. directly tantalum spinneret is carried out surface treatment with tantalum through the melten salt electriochemistry reaction, whole surface at tantalum spinneret comprises the micropore inwall, generating equably one deck is combined with the tantalum matrix and firmly contains the lithium tantalate modified layer, at nozzle surface, make it form the electrode position of a suitable viscose spinning, make it be difficult for absorption colloidal particles shape discarded object, thereby plug-hole is significantly reduced.
Process characteristic
1, disintegrating process
Alkali cellulose degree of grinding≤1.0%
2, filtering technique
Spin micelle subnumber (particle diameter 20--40 μ m), less than 30/gram spinning glue
3, spinning glue forms
First fibre 8.9 ± 0.1%
Contain alkali 5.4 ± 0.1%
50 ± 3 seconds falling ball methods of viscosity
Degree of ripeness 14 ± 2ml (10%NH4Cl)
1-2 kg/tonne of silk of auxiliary agent visco-388
0.2-0.5 kg/tonne of silk of auxiliary agent visco-32,
4, adopt one to bathe and two bathe moulding and combine, and two bathe and one to bathe interval time short, body lotion all filters, a bath and carried out degassed;
(1) one bathes composition
Sulfuric acid concentration 106--110g/l
Zinc sulfate 12.0---14.0g/l
Proportion 1.310-1.325
Warm 46---50 ℃ of acid
(2) two bathe composition
Sulfuric acid concentration 40--50g/l
Temperature 70---85 ℃
Claims (4)
1. a production process of ultrafine-denier high-strength viscose fibers, is characterized in that, comprises
(1) dipping, squeezing, alkali cellulose are pulverized, alkali cellulose degree of grinding≤1.0%;
(2) spin glue and filter, spin the micelle subnumber, particle diameter is 20--40 μ m, less than 30/gram spinning glue;
(3) spinning, the first fibre is 8.9 ± 0.1%, contains alkali 5.4 ± 0.1%, falling ball method viscosity 50 ± 3 seconds, degree of ripeness 10%NH
4Cl value 14 ± 2ml, 1-2 kg/tonne of silk of auxiliary agent visco-388,0.2-0.5 kg/tonne of silk of auxiliary agent visco-32;
(4) moulding, described moulding process comprises a bath, sulfuric acid concentration 106--110g/l, zinc sulfate 12.0---14.0g/l, proportion 1.310-1.325, sour temperature 46---50 ℃; Two bathe, sulfuric acid concentration 40--50g/l, and temperature 70---85 ℃, in described moulding process, spinning head is circular combined tantalum spinneret, spinning head aperture 0.05mm;
(5) drawing-off, described drawing-off total draft rate is 120-140%, one drawing-off 38---42%;
(6) concise, in described refining process, the desulfurization bath temperature is 80---85 ℃, and desulfurization bath concentration NaOH is 1-3 g/l, and feeder acetic acid pH value is 4---6.
2. root a tree name a kind of production process of ultrafine-denier high-strength viscose fibers claimed in claim 1, is characterized in that, described filtration comprises secondary filter, and the secondary filter filter screen adopts 15--25 μ m stainless steel metal fibre sintering felt.
3. root a tree name a kind of production process of ultrafine-denier high-strength viscose fibers claimed in claim 1, it is characterized in that, in described moulding process, one bathes tow length of immersion 700mm and two baths is placed in godet roller top in spinning machine, one bath and two is bathed body lotions and is all filtered, and described two baths are filtered and chosen diatomite is the drainage medium.
4. root a tree name a kind of production process of ultrafine-denier high-strength viscose fibers claimed in claim 1, is characterized in that, described spinning head is circular combined tantalum spinneret, and carry out surface treatment through the reaction of tantalum melten salt electriochemistry.
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102605462B (en) * | 2012-02-26 | 2014-02-05 | 昆山华阳复合材料科技有限公司 | High tenacity viscose fiber |
| CN103305939B (en) * | 2013-06-29 | 2016-01-20 | 宜宾丝丽雅股份有限公司 | Production process of fine denier viscose staple fiber |
| CN104389039A (en) * | 2014-11-06 | 2015-03-04 | 龙达（江西）差别化化学纤维有限公司 | Method for producing temperature-regulating viscose fibers |
| CN104790053A (en) * | 2015-04-21 | 2015-07-22 | 常熟市翔鹰特纤有限公司 | Method for manufacturing superfine denier viscose fibers |
| CN107326460B (en) * | 2017-07-27 | 2019-11-15 | 阜宁澳洋科技有限责任公司 | Equipment for after-treatment used in a kind of preparation method and preparation method of flocking viscose rayon |
| CN108677273B (en) * | 2018-05-15 | 2020-07-07 | 赛得利（福建）纤维有限公司 | Preparation method of fine denier strong viscose fiber |
| CN113737304A (en) * | 2021-09-13 | 2021-12-03 | 赛得利(中国)纤维有限公司 | Cellulose fiber for vortex spinning and preparation method thereof |
| CN114703653A (en) * | 2022-05-05 | 2022-07-05 | 张家港欣欣高纤股份有限公司 | Method for producing ultralow-titer antibacterial fiber |
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| CN1418990A (en) * | 2002-12-03 | 2003-05-21 | 上海双鹿化学纤维有限公司 | Ultralow denier fibre for viscose chemical fibre |
| CN1632189A (en) * | 2004-11-16 | 2005-06-29 | 唐山三友集团化纤有限公司 | High whiteness and strength adhesive short fiber and process for making same |
| CN101736409A (en) * | 2008-11-26 | 2010-06-16 | 上海中纺物产发展有限公司 | Production method of high-strength bamboo pulp viscose glue short fiber |
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2011
- 2011-06-30 CN CN 201110181917 patent/CN102251301B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4246221A (en) * | 1979-03-02 | 1981-01-20 | Akzona Incorporated | Process for shaped cellulose article prepared from a solution containing cellulose dissolved in a tertiary amine N-oxide solvent |
| CN1418990A (en) * | 2002-12-03 | 2003-05-21 | 上海双鹿化学纤维有限公司 | Ultralow denier fibre for viscose chemical fibre |
| CN1632189A (en) * | 2004-11-16 | 2005-06-29 | 唐山三友集团化纤有限公司 | High whiteness and strength adhesive short fiber and process for making same |
| CN101736409A (en) * | 2008-11-26 | 2010-06-16 | 上海中纺物产发展有限公司 | Production method of high-strength bamboo pulp viscose glue short fiber |
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Owner name: SATERI (JIUJIANG) CHEMICAL FIBER CO., LTD. Free format text: FORMER OWNER: LONGDA (JIANGXI) DIFFERENTIATED CHEMICAL FIBER CO., LTD. Effective date: 20150820 |
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Effective date of registration: 20150820 Address after: 332000 Golden Sand Bay Industrial Park, Hukou County, Jiangxi, Jiujiang Patentee after: Deli (Jiujiang) Fiber Co., Ltd. Address before: 332000 Golden Sand Bay Industrial Park, Hukou County, Jiangxi, Jiujiang Patentee before: Long Da (Jiangxi) differential chemical fiber Co., Ltd. |